Bike Tool Set in Tool Tray — Crank, Cassette & Freewheel Tools (1600SOS25)

Drivetrain service is the highest-volume work in most bike shops, and the tool count to service every drivetrain that walks in is large enough that a generic toolbox runs out before the bench has covered Shimano, SRAM AXS, Campagnolo, and the legacy Suntour freewheels still on older bikes. The Unior 1600SOS25 tray bundles the drivetrain-tool inventory into a single foam-cut drawer: 19 drivetrain tools covering chain replacement, crank service, cassette/freewheel removal, and bottom-bracket fitment up to the BB shell.

What’s in the tray

Chain service:

• Crank cap tool (1609.1); Shimano Hollowtech II crank-bolt preload cap.
• Crank cap tool for SRAM DUB (1609.2DUB/5); DUB-specific preload cap geometry.
• Pro pedal wrench (1613/2BI-US); 15 mm thin-profile wrench for road pedal installation.
• Chain wear indicator (1644/6); 0.5%/0.75% three-point gauge, reads modern 11+-speed and legacy 6–10-speed chains.
• Master chain tool (1647/2BBI-US); multi-format chain breaker covering 6–13 speed plus AXS Flattop via the modular insert system.

Crank service:

• Crank puller (1661/4); square taper crank-arm removal.
• Tapered crank puller (1662/4); alternative tapered-spindle crank-arm removal.

Cassette and freewheel removal:

• Freewheel removal tool (1670.1/4); standard freewheel splines.
• Freewheel remover Suntour® (1670.2/4 and 1670.3/4); two Suntour-specific freewheel patterns (the legacy Suntour mechanic catalog).
• Campagnolo cassette lockring tool (1670.4/4); Campagnolo lockring spline pattern.
• Cassette lockring tool (1670.5/4); Shimano HG / SRAM HG / Shimano Micro Spline / SRAM XD / XDR pattern.
• Freewheel remover for BMX® (1670.6/4); BMX freewheel spline pattern.
• Cassette lockring tool with 12mm guide pin (1670.9/4); for 12 mm thru-axle hubs.
• Chain whip, multispeed (1660/2DP-US); for cassette removal alongside the lockring tool.
• Cassette wrench (1670/2BI-US); for first-cog cassette holding.
• Cassette wrench for SRAM X-range (1670/2BI-AXS-US); 10-tooth-specific X-range cassette wrench.

Bottom bracket:

• Cartridge bottom bracket wrench (1671.8/2BI-US); cartridge BB removal.

Master link service:

• Master Link pliers (1720/4DP); open/close quick-link chain connectors.

Ratchet handle:

• Reversible ratchet 1/2” (190.1/1ABI-US); for the BB and cassette socket tools.

Why this is a complete drivetrain tray

Most drivetrain service jobs draw on tools from chain, crank, cassette, and BB categories simultaneously. A worn-chain replacement that reveals a worn cassette also benefits from a master-link verification, often a crank cap retightening, and sometimes a BB inspection. The 1600SOS25 keeps every tool that workflow needs in one drawer; pull the tray, do the service, slide the tray back.

Companion trays in the modular series:

• 1600SOS21; Hanger Alignment & Cable Pliers
• 1600SOS23; Sockets, Ratchets & Torque Wrench
• 1600SOS24; Cone Wrenches
• 1600SOS26; Bottom Bracket, Spoke & Brake Tools
• 1600SOS27; Hex/Torx T-Handles & Screwdrivers

Compatibility

Fits the full-width drawer slot in Unior’s tool carriages: Hercules, Eurovision, Eurostyle, Euromotion, and Europlus.

Built in Zreče, Slovenia

Unior has been forging hand tools in Zreče, Slovenia, since 1919, and is the official technical partner of multiple World Tour and downhill teams. The Master Chain Tool 1647/2BBI in this tray is the same chain tool SRAM lists as Flattop-compatible in their service-archive compatibility document; the modular-insert system Unior originated, not a re-badge of a generic chain tool.

Pro tip from our mechanics

The 1600SOS25 is the right purchase for shops that bill drivetrain service as a primary revenue line. Cassette swap, chain replacement, BB removal, and crank service all happen in the same drawer-pull. Our broader workshop-tool-allocation guide covers the trade-offs between bundle tray purchases and individual-tool purchases: How to set up a professional bike workshop →